Silt removing head



Jan. 1, 1935.

C. B. HARP S ILT REMOVING HEAD Filed April '25, 1934 7 INVENTQR 0HARLE$a. HARP- ATTORNEY Patented Jan. I 1935 i I i i i UNITED PATENT OFFICE fSILT REMOVING HEAD g Charles :LosAngeles, Calif. Atptatsamtea.19h.lserial No. 721,945 11 Claims. (01.3'7-78) This invention relates toasilt removing-head tion B may range over the 'areairomwhich siltadapted to be used in a silt removing'syst'em. Dis to be removed and anumber of heads C Silt carrying liquids will deposit silt at quiescentmaybe distributed over the .bed and in'positions zones, due to settlingof the-silt. Such quiescent determined to be most eli ective for removalof zones are present on the upside or dams silt. Thesilt removing systemis intended to be streams, in natural and artificially formed waterusedintermittently as a deposit of siltfhas accuaccumulating basins andother places. in many mu-lated necessitating removal. Thus. there mayinstances settling chambers are provided for the be comparatively longperiods during which the purpose of separating out some of the silt. Obheads 'are'not in use. Silt may pack around'the vi ly/ h accumulated imbe removed heads, enter orifices and make the system infrom time to timeand this removal should be operative unless the heads are designed topreeffectedexpeditiously, economically andwith l'east vent lodgment ofsilt. disturbance o th remainin water system. In In the presentinvention, protection fromlodg- Patent 1,777,491 ranted vt0 c b '7,merit 'ofsilt is accomplished .bya hood which 193 r Method of desiltine"channels, I have may bear conical'form with the crown or'tipj'disclosed a hydraulic methodof desi-lting basins. at the upper side. Thehood 5 may be of sheet The present invention appertainstosiltremoving'metal having at its hem an annular flange 6. h ads which be us d in aryin out such conneeteuto the'fhood 5 by'weloihg or an other am th d-whth app ed t ha n s rany asin suitatilemeans are stilts 7. These stiltsmay be in which silt may settle. metal bars having angular bends so asto have. #0

T i ts f th s v nti ar t provide a le s which ma be dispos d perendicular and s t removing h ad unted p a nt y in the tonne oagelbel'owthe hood; They notes a trash b m f a i havi y r ll of the l raekitoipreventehtranoe' of trash into the hood. l win f a r r r to pr v n gginof Stilts? maybe set ihtne foundation B to perinathe s ush i a e ope s;s u ture to provide a nently fasten the'head in selected position overslush mixing chamber wherein turbulence of the the b d I water andentrained silt is maintained to cause A slush conductor 'in'the formof'apip 8 .e'xits ready 110W into e 5 11 C dH S; 11188115 tends alongthe bed and at each head has ariseio cl n h lu h conductor in a e p i 9"which projects "centrally into the hood. The

if desired, to occlude e t a ce o s us to the top of the riser isenlarged and lateral inlet open- 30 s ush du t a d d tails f stru tunings 10 are provided therein, these openings being tr butins t s p ity, pa t s.v e th, adjacent the crown of the hood. The top'of riser anddurability of such heads together with ease 9 maybe closed by a chamber"11 which h s and certainty of operation. s pending nozzles 12 directedto project jets of These j ts a a plish d by m ans of water across the"openings 10. chamber '11 is t embodiment of y iIlVeIlliiOn' G 'SC 'Q tconnected to a conduit .13. The latter isadapted pp description dillustrated in t 1 to beconnected to a source or liquid under pros p yraw erin whichz V sure. When water under pressure is passed 1 is a s thr u h a'silt bed showing through conduit 13, jets will b'e'projecte'dby noz- 40 my p v d in el va n; F .2 is-a ertical' zles 12 across inletopenings 10. This will dissection hr u h a f m t of h ad on'an' en lodgeinsoluble material from the latter and in larged scale; and'Fig. 3 is asection, as seen "on the event flow of water is continued, will preventthe broken line 33 of Fig. 2. w j entrance of [slush making the headinoperative In order that the subsequent descriptionmay' be for removalofslush. clearly understood, certain terms used are here Rangingcircumferentially about the hood at a defined. The term silt is used ina sense inclusive point intermediate the top and bottom isa conofsolids, such as silt, sand, dirt or'the like, ca-' duit 1,4 which isconnected to a supply line 15 pable of being entrained in liquids; Slushis the leading to, a source of liquid under pressure. mixture of suchsilt. Basins are quiescent zones Connected to conduit 14 are nozzles 16positioned V in abody of liquid coextensive or partiallyexten to directfluid inwardly and downwardly in a sive therewith and may be eithernatural, ar spiral direction and thus cause turbulence of tificial orboth. liquid in the hood. e v

Referring more particularly to Fig. 1, the bed of Below conduit 14 isanother circumferentially a basin is indicated by A. A foundation ofceextending conduit 17 having nozzles or spouts 18a ment or the like isdenoted by B. The foundato project water downwardly and outwardlyparallel to the wall of the hood. These spouts are in registration withopenings 19 in flange 6 so that jets of water may pass to theoutside ofthe hood at the hem of the latter.

Pipes 13, 15 and 18 are preferably separately controlled and pipe 13 maylead to only a selected number of heads 0 while the pipes 15 and 18 maybe connected to all the heads or selected groups of heads as deemedadvisable for the particular conditions. Assume that a layer of silt Dhas accumulated and it is desired to remove it. During accumulation ofthe silt, the hood 5 will have offered protection to the slush intakeand nozzles of the head. The action is initiated by supplying waterunder pressure to pipes 13,. 151

and 18. The water issuing from nozzles12 will clear inlet openings 10 ofan accumulated material.

under the hood in a state of turbulence. Water issuing from spouts 18apasses intothe silt outside of the hood and creates a slush. The waterin pipe 13 is next shut off. This frees the inlet openings 10 for intakeof slush. Pipe 8 is sub jected to a suction'pressure thereby drawingslush. into the riser 9 and carrying it away. The silt D lowers, and inthe vicinity of the head slides' downwardly toward the latter.

The entire field zoned with the heads will be cleared of silt.Obviouslythe floors'of shallow basins may be sloped towards the heads toallow easier flow of silt. After removal of silt, the system is closeddown and silt again accumulates.

Thehoods 5 offer protection to the nozzles andintakes'against the loadof silt as well as shifting banks.

What I claim is: 1. A silt removing head mountedpermanently in thebottom of a basin comprising a hood, means open mounted permanently inthe bottom of a basin, a slush conductor having an intake cham-" berwith inlet openings disposed within said hood adjacent the crownthereof; a conduit adapted to be connected to a source of liquid underpressure and having means disposed and positioned within said hoodtoproduce turbulence of liquid therein; and a conduit adapted'to beconnected to a source of liquid under pressure and having spoutsdisposed to direct liquid outwardly from said hood at the hem thereof.

3. A silt removing head mounted permanently in the bottom of a basincomprising a hood, means, to support said hood in a position with itsmouth open mounted permanently in the bottom offla basin; a slushconductor having an intake cham ber with inlet openings disposed withinsaid hood adjacent the crown thereof, a conduit adapted to be connectedto a source of liquid under pres sure and having nozzles disposed toproject liquid across said inlet openings; a conduit adapted to beconnected to a source of liquid under pressure Water jetting fromnozzles .16 mixes. with; the silt, agitates the latter and keeps theliquid,

' inthe bottom of a basin comprising a hood mountand having meansdisposed and positioned within said hood to produce turbulence of liquidtherein; and a conduit adapted to be connected to a source of liquidunder pressure and having spouts disposed to direct liquid outwardlyfrom said hood at the hem thereof.

4. A silt removing head mounted permanently in the bottom of a basincomprising a hood mounted permanently in the bottom of a basin, spacedstilts extending from the hem of said hood to support the latterandforming an annular trash rack; a slush conductor having an intakechamber with inlet openings disposed within said hood adjacent the crownthereof; and a conduit adapted to be connected to a source of liquidunder pressure and having means disposed and positione'd within saidhood to produce turbulence of liquid therein.

5. A silt removing head mounted permanently ed permanently in the bottomof a basin, spaced stilts extending from the hem of said hood to supportthe latter and-forming an annular trash rack; a slush conductor havingan intake chamher with inlet openings disposed within said hood adjacentthe crown thereof; a conduit adapted to be connected to'a source ofliquid under pressure and having means disposed and positioned withinsaid hood to produce turbulence of liquid therein; and a conduit adaptedto be connected to a source of liquidunder pressure and having spoutsdisposed to direct liquid outwardly from said hood at the hem thereof. 7I V 6. A silt removing head mounted permanently in the bottom of a basincomprising a hood mounted permanently in the bottomof a basin, spacedstilts extending from the hem of said hood to support the latter andforming an annular trash rack; a slush conductor having an intakechamber with inlet openings disposed within said hood adjacent the crownthereof, a conduit adapted to be connected to a source of liquid underpressure and having nozzles disposed to project liquid across said inletopenings; a conduit adapted to be connected to a source of liquid underpressure and having means disposed and'positioned within said hood toproduce turbulence of liquid therein; and a conduit adapted to beconnected to a source of liq uid under pressure and having spoutsdisposed to direct liquid outwardly from said hood at the hem thereof.

7. A silt removing head mounted permanently in theibottom of a basincomprising a conical hood mounted permanently in the bottom of a basin,spaced stilts extending from the hem of said hood to support the latterand forming an annular trash rack; a slush' conductor extending axiallyinto said hood and having an intake chamber with inlet openings disposedwithin said hood adjacent the apex thereof, a conduit adapted to beconnected to a source of liquid under pressure and having nozzlesdisposed to project liquid across and through said inlet openings; aconduit adapted to be connected to a source of liquid under pressurehaving means disposed and positioned Within said hood to direct waterdownwardly andinwardly toward the axis of said hood to produceturbulencev of liquid therein; and a conduit adapted to be connected toa source of liquid under pressure having spouts disposed to directliquid parallel to the wall of said hood and outwardly from said hood atthe hem thereof.

1 CHARLES B. HARP.

